Grain scourer



- 2 sheets-Sheet, 1.

(No Model.)

G. SI GRANSON.

` GRAIN SGOURER.

Patented Jan. 18, 1887.

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e ses J are E n S N. PETERS, FhcwLnhagnpher. washington, D. C.

(No Model.) 2 Sheets-Sheet 2. G. S. CRANSON.-

GRAIN SGOURER.

Patented Jan. 18, 1887.

UNrTED STATES PATENT OFFICE.

GILES S. oEANSoN, oE SILVER CREEK, NEW YORK, AssroNoE rro eEANSoN, HUNTLEY a oo., on SAME PLACE.

GRAIN-SCOURER.

SPECIFICATION forming part of Letters Patent No. 356,273, dated January 18, 1887.

Application filed May 27, [886.

t the adhering impurities by the attrition of the kernels against each other and against nietallic surfaces, and which consist, essentially, of a horizontal scouring-case through which the grain passes slowly, and rotating stirrers which move and scour the grain and cause it to rub against the ease as the grain passes from the feed to the discharge end of the case.

The object of this invention is to improve the devices whereby the grain is scoured and to regulate the discharge of the scoured grain from the case, and my invention consists, to that end, of the improvements which will be hereinafter fully set forth, and pointed out in the claims.

In the accompanying drawings, consisting of two sheets, Figure l is a longitudinal sectional elevation of my improved grain-scourer. Fig. 2 is a crosssection in line x x, Fig. 1, on an enlarged scale. Fig. 3 is a cross-section in line y y, Fig. 1. Fig. 4 is a longitudinal section of the discharge end of the scouring-case, on an enlarged scale. Fig. 5 is a crosssection in line z z, Fig. l, on an enlarged scale. Fig. 6 is a fragmentary elevation of the scouringdrum. Fig. 7 is a fragmentary cross-section of one of the pivoted scouring-plates. Fig. 8 is a side elevation of one of the stirrers. Fig. 9 is an elevation at rightangles to Fig. 8.

Like letters of reference refer to like parts in the several figures.

A represents the stationary main frame of the machine; B, the preliminary separating-l screen; and G, the separating wind trunk, through which the grain passes from the screen B to the feed-hopper D. n

E represents the horizontal shaft, journaled in bearings e e, secured to the frame A, and carrying near one end the fan-blades E', which rotate within a ease, E.

F represents the scouring drum or cylinder, secured to the shaft E within the perforated g2, formed in the frame G2.

Serial No. 203,332. (No model.)

scouring-case G, which latter is supported on the main frame A by two frames, G G.

H represents the tight casing inclosing the perforated scouring-case G, and h represents an ainpassage formed between the latter and the inclosing-casing H. This passage communicates with one eye of the fan E by means of openings g, formed in the frame G and a passage, g', and it receives air'through openings I represents the discharge chamber, arranged at the rear end ofthe scouring-case G, and separated from the same by a partition or. plate, t', which is provided in its upper portion with a discharge-opening, t. The inner side of the plate t', which faces the rear end'ot' the scouring-drum F, is provided with an annular ro-w of serrations, 2, against which the grain is rubbed before it escapes through the opening i.

J'represents a movable valve plate or gate arranged on the outer side of the opening i in the chamber I, and made movable toward and from the partition t by sliding on pinsj.

K represents a horizontal adjustingbolt, 75 which is secured with its inner end to the plate J, and which carries at its outer end a thumbnut, j. The latter bears against the outer side of ,the nal discharge-spout L.

j2 represents a spring interposed between 8o the plate .I land the frame G, and so as to press the plate .I toward the partition i. The plate J is made somewhat smaller than the opening i', so as to leave at the upper edge of the plate a narrow passage through which the 85 grain escapes from the scouring-case through the opening i. Vhen the grain Ais fed into the machine so fast that this passage Iis unable to discharge the grain, the pressure of t-he grain aga-inst the yielding plate J forces the latter 9o away from the partition i, thereby increasing the size of the discharge-passage until the pressure is relieved. As soon as this takes place the spring jZ returns the plate to its former position. Bythis means'the grain isheld inthe 9'; scouring-case a sufficient length of time to insure the proper cleaning of the grain, while an undue accumulation of the grain is prevented. The grain which'passes into the chamber I through the opening tis discharged from 10o 3o grain against the scouring-case.

of the movement has been reached.

said chamber through spouts Z and Z into the final discharge-spout L.

M represents the stirrers or teeth which are Vsecured to the surface of the scouring-drum F. 5 These teeth are made tapering or wedge-shaped in the direction in which they rotate, and they are arranged with their narrow sides forward, so that they divide the grain as they pass through it. Each tooth is provided in its 1o Sides and crown with grooves or corrugations m, which increase in depth from the base to the crown of the tooth, and which are separated by plain or blunt surfaces, as clearly represented in Figs. S and 9. These teeth I5 seize the kernels of grain and roll them over and against each other and against the scouring-case as the teeth sweep through the mass of grain, thereby scouring the kernels and detaching the adhering impurities therefrom 2o without cutting or breaking the grain.

N represents inclined flights, which are secured to the scouring-drum so as to propel the grain from the feed end toward the discharge end of the machine.`

vO represents curved scouringplates hinged or pivoted to the drum F on diametricallyopposite sides of the same, and in such inanner that these plates will be swung outwardly by the centrifugal force, so as to press the The outward movement of the free end of each plate O is limited by bolts p, which are secured to the drum F, and provided with heads p', against which the plates bear when the outward limit These bolts are so adjusted on the drum F by screwnuts that the plates will rub the grain properly against the scouring-case and free the grain from adhering impurities without, how- 40 ever, crushing or cutting the grain, which would be liable to take place in the absence of these stops.

rIhe outer faces ot the pivoted scouring plates O are pro vided with recesses orindentations q, which seize the grain and roll it or turn it over repeatedly, so as to thoroughly clean all parts of the grain. These recesses are cheaply formed by constructing each plate of two thicknesses of metal-an outer perforated plate, r, andan inner imperforated plate,

5 5 portions alternate with the scouring-plates.

By my improved scouring mechanism the kernels of grain are rolled over or turned and rubbed or scoured on all sides by a gentle acpressedvtoward the discharge-opening, substantially as set forth.

2. The combination,with a horizontal scouringcylinder, G, provided with a rear plate, t', having a discharge-opening, i', of a movable Valve-plate, J, adj usting-bolt K, spring j, and guide-pins j, substantially as set forth.

3. The combination, with a scouring-drum, F, a perforated scouring-cylinder, G, having an elevated discharge-opening, z", and an inclosing tight casing, H, of a discharge-chainber, I, Vformed at the discharge end of the scouring-cylinder, and an automatic dischargevalve, J, arranged in the chamber I, to open and close the opening i', substantially as set forth.

4.. In a grainscourer, the combination,with a scouring-case, of rotating stirrer-teeth M, made tapering or wedge-shaped in the direction of their motion, and constructed in their sides and crowns with grooves running from the bases to the crowns of the teeth and separated by plain surfaces, substantially as set forth.

5. In a grain-scourer, the combination,with a scouring-case, of rotating stirrer-teeth M, made tapering or wedgeshaped in the direction of their motion, and constructed in their sides and crowns with blunt corrugations running from the bases to the crowns ofthe teeth and increasing in depth from the bases to the crowns, substantially as set forth.

6. The combination,with the scouring-case, of a scouringdrum, a movable scouring-plate hinged or pivoted to said drum, and a stop whereby the outward movement of the scouring-plate is limited, substantially as set forth.

7. The conibinatiomwith a scouring-case, of a scouring-drum provided with hinged scouringplates having indentations or recesses on their outer sides, and projecting corrugated stirrers secured to the drum between the scouring-plates, substantially as set forth.

Vitness my hand this 22d day of May, 1886.

` G. S. CRANSON. VitnesSes:

JN0. J. BONNER, OscAR Sermon. 

